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Table 1 Color changes of glazed samples protected by materials

From: Protection of glazed tiles in ancient buildings of China

Sample name

ΔL*

Δa*

Δb*

ΔE

SIC-1 glaze layer

− 1.32

0.70

2.87

3.23

SIC-2 glaze layer

− 1.46

0.85

1.26

2.10

SIC-3 glaze layer

− 1.93

1.37

2.23

3.25

SIC-1 matrix

0.68

− 0.22

1.62

1.76

SIC-2 matrix

− 2.38

1.30

1.54

3.11

SIC-3 matrix

− 4.21

1.88

2.97

5.47